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What is HDTV

HDTV and SDTV Compared

To better understand why you see such a crisp beautiful picture with HDTV here are some key technical specification comparisons between "Standard Definition Television" (SDTV) and High Definition Television (HDTV). When shopping for an HDTV display this is the kind of information that you should know. Of course, an HD set with a built-in ATSC tuner can receive television channels and programs in all formats. An HD-Ready set can do the same, when connected to a cable or satellite HD set top box.

Analogue Standard Definition High Definition
Visible Pixel Count 253,000 +/- 480,000*

920,000 @ 720p
2,000,000+@1080i

Horiz. Scanning Lines 480i 480i or 480 p 720p or 1080i
Aspect Ratio 4 x 3 4 x 3 or 16 x 9 16 x 9
Progressive Scan No Yes Yes
Interlaced Scan Yes Yes Yes
Audio 2 channel 2 channel digital ** Dolby Digital
Broadcast Formats 1 Analogue (NTSC) 12Digital Formats 6 Digital Formats

* Approx. total, including Y, Pr, Pb

** Off-air, certain cable and satellite services may offer 5.1 channels.

HDTV provides a new level of viewing satisfaction that must be experienced to be fully appreciated!


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